Daikin FXSQ63P7VEB [279/370] Service diagnosis 270

Daikin FXSQ25PVE [279/370] Service diagnosis 270
SiBE311209 Troubleshooting by Indication on the Remote Controller
Service Diagnosis 270
A
Disconnect the sensor connector
(X2A or X4A) from the fan motor,
and then turn ON the power supply.
Is any error code
other than "LC
"
displayed?
YES
NO
The micro-computer
normal monitor
(green) of the outdoor
unit main PCB (A1P)
is blinking.
NO
YES
The micro-computer
normal monitor (green)
of the outdoor unit
main PCB (A4P) is
blinking.
NO
YES
The “
LC
” error
recurs.
YES
NO
Take countermeasures
following the displayed
error code.
Not the “
LC
” error.
Check the error code
again.
Replace the inverter
PCB (A4P).
If the replaced PCB
has significant
damage, the
compressor is
probably get
defective. In this
case, carry out
inspections on the
compressor again.
Replace the outdoor
unit main PCB (A1P).
Continue the operation.
(It is supposed that the
error results from
causes such as
instantaneous power
failure.)
The INV.
compressor has
insulation resistance
of not more than
100k.
The fan motor has
insulation resistance
of not more than
1M.
YES
NO
YES
NO
Replace the compressor (M1C).
Replace the fan motor.

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